Question 307367
Without an x value you only have:
y = -8 - 4
y=-12 which is a y intercept=-12 and a horizontal line through that point.
 {{{ graph( 300, 200, -6, 5, -15, 10, y = -12) }}} (graph 300x200 pixels, x from -6 to 5, y from -15 to 10, y = -12).